I recently updated ZP and now I can't seem to edit themes within it anymore.

Tried re-installing twice and it still shows a blank page whenever I click a file listed in the theme editor sidebar.

Is anyone else having this problem?

If you get a blank page you really should first look into your server's error log. It's probably the permissions.

My editor seems to work. I haven't used it do do actual editing, however.

Well, I gave the themes folder and all files full permission and it still doesn't display code when I try to open files from within.

The error log shows absolutely nothing, so not sure there.

I've never had this problem before, even though I only use it to swap out the comment box with disqus. LOL

Sorry, without more information we can only make guesses. Since this seems to work for most, it is probably something specific to your installation. But what requires knowing what errors have been generated.

Somewhere there will be an error log with these errors. Blank pages just do not occur when no errors happen. Otherwise there will be some display, for instance the framework within which the edited code should show.

Okay two of the four error log txts seem to no longer be 0B so I'll paste what they say...

[Mon Jul 16 03:02:03 2012] [error] [client 157.56.95.137] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.

[Sun Jul 15 20:08:46 2012] [error] [client 69.58.178.57] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
[Mon Jul 16 12:50:11 2012] [error] [client 180.76.5.91] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.

I dunno if that means anything.

Quite possibly. What are the links you get for loading the script into the editor? Maybe these errors are saying that they are a looping reference. That could have to do with bad rewrite rules in a .htaccess file somewhere.